I was fedup when I printed another Z stop I found on thingiverse. The silly thing was way oversized and the M2 octagonal knob just slipped. Waste of material and time!
So I made my own. It's strong and chunky and will last you a lifetime. And it fits properly on the original M2 octagonal knob. To ensure it will fit make sure it's a max of 33mm between flats on the original M2 knob.
You can also flip it over and use it as a winding handle. But dont leave it on when printing, as it will interfere if the extruder gets close.
M2_Z_Stop.STL | 422.3KB |